Be carefull when you pull the spoiler, there is double sided sticky tape between it and the trunk lid. You will have to pry the two apart wthout hurtin the paint or denting the trunk lid. Best thing I have found to use is a cheap, throw-away plastic putty knife like you get at Wally World. Force it between the spoiler and the trunk lid all of the way around till it comes loose. All of this after you remove the 4 mounting nuts on the inside of the trunk lid of course. When you get ready to put the spoiler back on you can get more 3M sticky tape at most any part store like O'Reilly's or the dreaded AutoZone.

When the clear coat starts flaking off, it;s usually because the basecoat, primer, etc, have failed, and are moving around under the clear. Back in the 80's and 90's, the problem was poor coverage and virtually no UV protection. UV would go right through and destroy the primer, which would cause the entire job to fail......

My bronco had this, and so did my 90 LSC. I sold the LSC, and re-painted the bronco. Had to go all the way down to bare metal to resolve the issue....